[Pg ii]

[Pg iii]

To
Dr. F. M. Hexamer

IN HONOR OF HIS LIFELONG EFFORTS FOR THE
BETTERMENT OF AMERICAN HORTICULTURAL
PRACTICE

Copyright, 1907, by
ORANGE JUDD COMPANY

All rights reserved

WHERE NEW VARIETIES OF TOMATOES ARE DEVELOPED AND TESTED
(By courtesy American Agriculturist. Photo by Prof. W. G. Johnson)

PREFACE

I have made free use of, without special credit, and am largely indebted to, the writings of Doctor Sturtevant and Professor Goff, Professor Munson of Maine, Professor Halsted of New Jersey, Professor Corbett of Washington, Professor Rolfs of Florida, Professor Bailey of New York, Professor Green of Ohio, and many others. I have also found a vast amount of valuable information in the agricultural press of this country in general. I am also indebted to L. B. Coulter and Prof. W. G. Johnson for many photographs. My thanks are also due B. F. Williamson, who made the excellent drawings for this book under Professor Johnson's direction.

Tomatoes are among the most generally used and popular vegetables. They are grown not only in gardens, but in large areas in every state from Maine to California and Washington to Florida, and under very different conditions of climate, soil and cultural facilities, as well as of requirements as to character of fruit. The methods which will give the best results under one set of conditions are entirely unsuited to others.

I have tried to give the nature and requirements of the plant and the effect of conditions as seen in my own experience, a knowledge of which may enable the reader to follow the methods most suited to his own conditions and requirements, rather than to recommend the exact methods which have given me the best results.

 Will W. Tracy.

Washington, April, 1907.

CONTENTS

Preface v

CHAPTER I

Botany of the Tomato 1

CHAPTER II

History 14

CHAPTER III

General Characteristics of the Plant 20

CHAPTER IV

Essentials for Development 28

CHAPTER V

Selection of Soil for Maximum Crop 33

CHAPTER VI

Exposure and Location 38

CHAPTER VII

Fertilizers 43

CHAPTER VIII

Preparation of the Soil 46

CHAPTER IX

Hotbeds and Cold-frames 51

CHAPTER X

Starting Plants 59

CHAPTER XI

Proper Distance for Planting 68

CHAPTER XII

Cultivation 76

CHAPTER XIII

Staking, Training and Pruning 79

CHAPTER XIV

Ripening, Gathering, Handling and Marketing the Fruit 90

CHAPTER XV

Adaptation of Varieties 97

CHAPTER XVI

Seed Breeding and Growing 112

CHAPTER XVII

Production for Canning 117

CHAPTER XVIII

Cost of Production 121

CHAPTER XIX

Insects Injurious to the Tomato 123

CHAPTER XX

Tomato Diseases 131

Index 148

ILLUSTRATIONS

TOMATO CULTURE

CHAPTER I

The common tomato of our gardens belongs to the natural order Solanaceae and the genus Lycopersicum. The name from lykos, a wolf, and persica, a peach, is given it because of the supposed aphrodisiacal qualities, and the beauty of the fruit. The genus comprises a few species of South American annual or short-lived perennial, herbaceous, rank-smelling plants in which the many branches are spreading, procumbent, or feebly ascendent and commonly 2 to 6 feet in length, though under some conditions, particularly in the South and in California, they grow much longer. They are covered with resinous viscid secretions and are round, soft, brittle and hairy, when young, but become furrowed, angular, hard and almost woody with enlarged joints, when old. The leaves are irregularly alternate, 5 to 15 inches long, petioled, odd pinnate, with seven to nine short-stemmed leaflets, often with much smaller and stemless ones between them. The larger leaflets are sometimes entire, but more generally notched, cut, or even divided, particularly at the base.

The flowers are pendant and borne in more or less branched clusters, located on the stem on the opposite side and usually a little below the leaves; the first cluster on the sixth to twelfth internode from the ground, with one on each second to sixth succeeding one. The flowers (Fig. 2) are small, consisting of a yellow, deeply five-cleft, wheel-shaped corolla, with a very short tube and broadly lanceolate, recurving petals. The calyx consists of five long linear or lanceolate sepals, which are shorter than the petals at first, but are persistent, and increase in size as the fruits mature. The stamens, five in number, are borne on the throat of the corolla, and consist of long, large anthers, borne on short filaments, loosely joined into a tube and opening by a longitudinal slit on the inside, and this is the chief botanical distinction between this genus and Solanum to which the potato, pepper, night shade and tobacco belong. The anthers in the latter genus open at the tip only. The two genera, however, are closely related and plants belonging to them are readily united by grafting. The Physalis, Husk tomato or Ground cherry is quite distinct, botanically. The pistils of the true tomato are short at first, but the style elongates so as to push the capitate stigma through the tube formed by the anthers, this usually occurring before the anthers open for the discharge of the pollen. The fruit is a two to many-celled berry with central fleshy placenta and many small kidney-shaped seeds which are densely covered with short, stiff hairs, as seen in Figs. 3 and 4.

It is comparatively easy to define the genus with which the tomato should be classed botanically, but it is by no means so easy to classify our cultivated varieties into botanical species. We have in cultivation varieties which are known to have originated in gardens and from the same parentage, but which differ from each other so much in habit of growth, character of leaf and fruit and other respects, that if they had been found growing wild they would unhesitatingly be pronounced different species, and botanists are not agreed as to how our many and very different garden varieties should be classified botanically. Some contend that all of our cultivated sorts are varieties of but two distinct species, while others think they have originated from several.

Classification.—The author suggests the following classification, differing somewhat from that sometimes given, as he believes that the large, deep-sutured fruit of our cultivated varieties and the distinct pear-shaped sorts come from original species rather than from variations of Lycopersicum cerasiforme:

Currant tomato, Grape tomato, German or Raisin tomato (Lycopersicum pimpinellifolium, L. racemiforme) (Fig. 5).—Universally regarded as a distinct species. Plant strong, growing with many long, slender, weak branches which are not so hairy, viscid, or ill-smelling, and never become so hard or woody as those of the other species. The numerous leaves are very bright green in color, leaflets small, nearly entire, with many small stemless ones between the others. Fruit produced continuously and in great quantity on long racemes like those of the currant, though they are often branched. They continue to elongate and blossom until the fruit at the upper end is fully ripened. Fruit small, less than ½ inch in diameter, spherical, smooth and of a particularly bright, beautiful red color which contrasts well with the bright green leaves, and this abundance of beautifully colored and gracefully poised fruit makes the plant worthy of more general cultivation as an ornament, though the fruit is of little value for culinary use. This species, when pure, has not varied under cultivation, but it readily crosses with other species and with our garden varieties, and many of these owe their bright red color to the influence of crosses with the above species.

FIG. 5—CURRANT TOMATO AND CHARACTERISTIC CLUSTERS

FIG. 6—RED CHERRY TOMATO

Cherry tomato (L. cerasiforme) (Fig. 6).—Plant vigorous, with stout branches which are distinctly trailing in habit. Leaves flat or but slightly curled. Fruit very abundant, borne in short, branched clusters, globular, perfectly smooth, with no apparent sutures. From ½ to ¾ inch in diameter and either red or yellow in color, two-celled with numerous comparatively small, kidney-shaped seeds. Many of our garden varieties show evidence of crosses with this species, and by many it is regarded as the original wild form of all of our cultivated sorts. These, when they escape from cultivation and become wild plants, as they often do, from New Jersey southward, produce fruit which, in many respects, resembles that of this species in size and form; but they are generally more flattened, globe-shaped, with more or less distinct sutures on the upper side, and I have never seen any fruit of these wild plants which could not be readily distinguished from that of the true Cherry tomato.

Prof. P. H. Rolfs, Director of the Florida experiment station, reports that among the millions of volunteer, or wild, tomatoes he has seen growing in the abandoned tomato fields in Florida, he has never seen a plant with fruit which could not be easily distinguished from that of the true Cherry tomato. Again, one can, by selection and cultivation, easily develop from these wild forms plants producing fruit as large and often practically identical with that of our cultivated varieties, while I have given a true stock of Cherry tomato most careful cultivation on the best of soil for 20 consecutive generations without any increase in size or change in character of the fruit.

Pear (not Plum) tomato (L. pyriforme) (Fig. 7).—Plant exceptionally vigorous, with comparatively few long, stout stems inclined to ascend. Leaves numerous, broad, flat, with a distinct bluish-green color noticeable, even in the cotyledons. Fruit abundant, borne in short branched or straight clusters of five to ten fruits. It is perfectly smooth, without sutures, and of the shape of a long, slender-necked pear, not over an inch in transverse by 1½ inches in longitudinal diameter. When the stock is pure the fruit retains this form very persistently. The production of egg-shaped or other forms is a sure indication of impure stock. They are bright red, dark yellow, or light yellowish white in color, two-celled, with very distinct central placenta and comparatively few and large seeds. The fruit is inclined to ripen unevenly, the neck remaining green when the rest of the fruit is quite ripe. It is less juicy than that of most of our garden sorts but of a mild and pleasant flavor. This is considered, by many, to be simply a garden variety, but I am inclined to the belief that it is a distinct species and that the contrary view comes from the study of the impure and crossed stocks resulting from crosses between the true Pear tomato and garden sorts which are frequently sold by seedsmen as pear-shaped. Many garden sorts—like the Plum (Fig. 8), the Egg, the Golden Nugget, Vick's Criterion, etc.—are known to have originated from crosses of the Pear and I think that most, if not all, the garden sorts in which the longitudinal diameter of the fruit is greater than its transverse diameter owe this form to crosses with L. pyriforme.

FIG. 9—ONE OF THE FIRST ILLUSTRATIONS OF THE TOMATO
Poma amoris, (Pomum aureum), (Lycopersicum), 1581

FIG. 10—AN EARLY ILLUSTRATION OF THE TOMATO
(From Morrison's "Historia Universalis," 1680)

This has commonly been regarded by botanists as a degenerate form of our garden tomatoes, rather than as an original species, but I find that, like L. cerasiforme and L. pyriforme, it is quite fixed under cultivation, except as crossed with other species or with our garden varieties, and I believe it to be the original species from which our cultured sorts have been developed, by crossing and selection. Such crosses probably were made either naturally or by natives before the tomato was discovered by Europeans. The earliest prints we have of the tomato (Figs. 9 and 10) are far more like the fruit of this plant than that of L. cerasiforme, and the prints of many of the earliest garden varieties and of some sorts which are still cultivated in southern Europe, for use in soups, are like it not only in size and form, but in flavor. These facts make it seem far more probable that our cultivated sorts have come, by crossing, between this and other species rather than by simple development from L. cerasiforme.

Prof. E. S. Goff, of Wisconsin, who has made a most careful study of the tomato, expressed the same opinion, writing that it seemed to him that our cultivated sorts must have come from the crossing of a small, round, smooth, sutureless type, with a larger, deep-sutured, corrugated fruit, like that of the Mammoth Chihuahua, but smaller. However this may be, I think that it is wise to throw all of our cultivated garden sorts, except the Pear, the Cherry, and the Grape—which I regard as distinct species—together under the name of L. esculentum, even when we know they have originated by direct crosses with the other species; and it is well to classify the upright growing sorts under the varietal names, L. validum, and the larger, heavier sorts, as L. grandifolium, as has been done by Bailey. (Cyclopedia of Horticulture.)

CHAPTER II

1. Large yellow, described by Matthiolus in 1554 and called Golden apple.
2. Large red, described by Matthiolus in 1554 and called Love apple.
3. Purple red, described by D'el Obel in 1570.
4. White-fleshed, described by Dodoens in 1586.
5. Red cherry, described by Bauhin in 1620.
6. Yellow cherry, described by Bauhin in 1620.
7. Ochre yellow, described by Bauhin in 1651.
8. Striped, blotched or visi-colored, described by Bauhin in 1651.
9. Pale red, described by Tournefort in 1700.
10. Large smooth, or ribless red, described by Tournefort in 1700.
11. Bronzed-leaved, described by Blacknell in 1750.
12. Deep orange, described by Bryant in 1783.
13. Pear-shaped, described by Dunal in 1805.
14. Tree tomato, described by Vilmorin in 1855.
15. Broad-leaved, introduced about 1860.

The special description of No. 10 by Tournefort in 1700 would indicate that large smooth sorts, like Livingston's Stone, were in existence fully 200 years ago, instead of being modern improvements, as is sometimes claimed; and a careful study of old descriptions and cuts and comparing them with the best examples of modern varieties led Doctor Sturtevant in 1889 to express the opinion that they had fruit as large and smooth as those we now grow, before the tomato came into general use in America, and possibly before the fruit was generally known to Europeans. Even the production of fine fruit under glass is not so modern as many suppose. In transactions of the London Horticultural Society for 1820, John Wilmot is reported to have cultivated under glass in 1818 some 600 plants and gathered from his entire plantings under glass and in borders some 130 bushels of ripe fruit. It is stated that the growth that year exceeded the demand, and that the fruit obtained was of extraordinary size, some exceeding 12 inches in circumference and weighing 12 ounces each. Thomas Meehan states in Gardeners' Monthly for February, 1880, that on January 8, of that year, he saw growing in the greenhouses on Senator Cannon's place near Harrisburg, Pa., at least 1 bushel of ripe fruits, none of which were less than 10 inches in circumference,—a showing which compares with the best to be seen to-day.

Throughout southern Europe the value of the fruit for use in soups and as a salad seems to have been at once recognized, and it came into quite general use, especially in Spain and Italy, during the 17th century; but in northern Europe and England, though the plant was grown in botanical gardens and in a few private places as a curiosity and for the beauty of its fruit, this was seldom eaten, being commonly regarded as unhealthy and even poisonous, and on this account, and probably because of its supposed aphrodisiacal qualities, it did not come into general use in those northern countries until early in the 19th century.

First mention in America, I find of its being grown for culinary use, was in Virginia in 1781. In 1788 a Frenchman in Philadelphia made most earnest efforts to get people to use the fruit, but with little success, and similar efforts by an Italian in Salem, Mass., in 1802, were no more successful. The first record I can find of the fruit being regularly quoted in the market was in New Orleans in 1812, and the earliest records I have been able to find of the seed being offered by seedsmen, as that of an edible vegetable, was by Gardener and Hipburn in 1818, and by Landreth in 1820. Buist's "Kitchen Gardener" says: "In 1828-9 it (the tomato) was almost detested and commonly considered poisonous. Ten years later every variety of pill and panacea was 'extract of tomatoes,' and now (1847) almost as much ground is devoted to its culture as to the cabbage." In 1834 Professor Dunglison, of the University of Virginia, said: "The tomato may be looked upon as one of the most wholesome and valuable esculents of the garden."

Yet, though the fruit has always received similar commendation from medical men, there has been constant recurring superstition that it is unhealthy. Only a few years ago there was in general circulation a statement that an eminent physician had discovered that eating tomatoes tended to develop cancer. This has been definitely traced to the playful question, asked as a joke by Dr. Dio Lewis, "Didn't you know that eating bright red tomatoes caused cancer?" In more recent years an equally unfounded claim has been made that tomato seeds were responsible for many cases of appendicitis and that it was consequently dangerous to eat the fruit.

I give some quotations for tomatoes in Quincy Hall Market, Boston, with some for other vegetables, for comparison. The records show that during the week ending July 22, 1835, tomatoes were quoted at 50 cents per dozen, cabbage at 50 cents per dozen. For the week ending September 22, 1835, tomatoes were quoted at 25 cents per peck, lima beans, 12½ cents per quart shelled, with comment that tomatoes are in much demand and a far greater quantity has been sold than in previous years. During the week ending July 22, 1837, tomatoes were quoted at 25 and 50 cents per peck, and the note that they are of good size and were well ripened and came from gardens in the vicinity would indicate that they had at that time early maturing varieties and knew how to grow them. From about 1835 till the present time the cultivation and use of tomatoes have constantly increased both in this country and in Europe, so that now they are one of the most largely grown of our garden vegetables.

A suggestion as to the extent they are now grown in America is the fact that a single seed grower saved in 1903 over 20,000 pounds of tomato seed—an amount sufficient to furnish plants for from 80,000 to 320,000 acres, according to the care used in raising them, the larger quantity not requiring more care than the best growers commonly use. A careful estimate made by the American Grocer shows that in 1903 the packing of tomatoes by canners in the United States amounted to 246,775,426 three-pound cans. In addition to the canned tomato, between 200,000 and 250,000 barrels of catsup stock is put up annually, requiring the product of at least 20,000 acres.

It is probable that the area required to produce the fruit that is used fresh at least equals that devoted to the production for preserving, which give us from 400,000 to 500,000 acres devoted to this crop each year in America alone. The fruit is perhaps in more general use in America than elsewhere, but its cultivation and use have increased rapidly in other countries, particularly with the English speaking races. Large quantities are grown in Australia, and immense and constantly increasing quantities are grown under glass in England and adjacent islands, while The Gardeners' Chronicle states that in 1903 between 600,000 and 800,000 pounds of fresh fruit were imported into England from other countries.

CHAPTER III

I know of an instance where two adjoining fields belonging to A and B were set with tomatoes, using plants started in the same hotbed from the same lot of seed. The soil was of equal natural fertility and each field received about the same quantity of manure, though that given A's was all well decomposed and worked into the soil, while that given B's was fresh and raw and simply plowed in. A's field was put into the best possible tilth before setting the plants, and the management of the plants and their cultivation were such as to secure unchecked growth from the time they were pricked out into cold-frames and set in the field until the crop was matured. As long as the plants would permit, the soil was cultivated every few days and kept in a state of perfect tilth.

B's field when the plants were set out was a mass of clods, as it had been plowed, when wet, some time before and never harrowed but once. The plants had been crowded forward as rapidly as possible in the cold-frame, and when set in the field were much higher than A's, but so soft that they were badly checked in transplanting and a great many of them died and had to be reset. The field received but one or two cultivations during the entire season. The growth of the plants in B's field was irregular and uneven instead of steady and uniform as in A's, and though some of the fruits were quite as large, they were not as uniform as A's while the yield per acre was not more than half as much nor the fruit of as good general quality. B had difficulty in disposing of his crop and often had to sell below the market, while A had no trouble in disposing of his at the highest prices for the day. B's crop was a financial loss, while A's returned a most satisfactory profit.

The key to the most successful culture of the tomato is the securing, from the start to finish, of an unchecked uniform growth, though it need not necessarily be a rapid one. The failure to do this is, in my opinion, the principal reason for the comparatively small yield usually obtained, which is very much less than it would be with better cultural management. The tomato under conditions which I have repeatedly found it practicable to secure, not only in small plantings but in large fields, has proved capable of producing from 1,000 to 1,200 or even more bushels to the acre, and the possible yield per plant is enormous.

As early as 1818 the Royal Horticultural Society of London reports the obtaining of over 40 pounds of fruit of marketable character from a single vine. An acre of such plants would give a yield of over 1,800 bushels of fruit, and many similar yields, and even greater ones, have been recorded for single plants. The yield commonly obtained, even in favorable locations, and by men who have grown tomatoes all their lives, is more often less than 200 bushels to the acre than more. The way to secure a better yield is to study carefully the nature and requirements of the plants and the adaptation of our cultural practice to them.

Life habit of the plant.—The tomato could be described as a short-lived perennial, but its span of life is somewhat variable. Under favorable conditions it will develop from starting seed to first ripe fruit in from 85 to 120 days of full sunshine with a constant day temperature of from 75 to 90° F., and with one from 15 to 20° F. lower at night. The plants will ordinarily continue in full fruit for about 50 to 60 days, after which they generally become so exhausted by excessive production of fruit and the effects of diseases to which they are usually subject that their root action and sap circulation become weaker and weaker until they die from starvation. From Philadelphia southward gardeners expect that spring set plants will thus exhaust themselves and die by late summer, and they sow seed in late spring or early summer for plants on which they depend for late summer and fall crops.

Under some conditions, particularly in the Gulf states and in California, tomato plants will not only grow to a much greater size than normal, but will continue to thrive and bear fruit for a longer time. Such a plant grown in Pasadena, Cal., was said to have been in constant bearing for over 10 months. Again, sometimes plants that have produced a full crop of fruits will start new sets of roots and leaves and produce a second and even a third crop, each, however, being produced on new branches and as a result of a fresh set of roots, those which produced the preceding crop having died and disappeared. The period of development, 85 to 120 days of full sunshine at a temperature above 75° F., has been given. The full sunshine and high temperature are essential to such rapid development, and in so far as there is a lack of sunshine from clouds or shade, or the day temperature falls below 75° F. the period will be lengthened, so that in the greater part of the United States the elapsed time between starting seed to ripened fruit is usually as much as from 120 to 150 days and often even longer.

Characteristics of the root.—The roots of the tomato plant, while abundant in number, are short and can only gather food and water from a limited area. A plant of garden bean, for instance, is not more than half the size of one of the tomato, but its roots extend through the soil to a greater distance, gather plant food from a greater bulk of soil, seem better able to search out and gather the particular food element which the plant needs than do those of the tomato. This characteristic of the latter plant makes the composition of the soil as to the proportion of easily available food elements of great importance. Tomato roots are also exceedingly tender and incapable of penetrating a hard and compact soil, so that the condition of the soil as to tilth is of greater importance with regard to tomatoes than with most garden vegetables.

Another characteristic of the tomato roots is that the period of their active life is short. When young they are capable of transmitting water and nutritive material very rapidly, but they soon become clogged and inefficient to such an extent as to result in the starvation and death of the plant. If the branches of such an exhausted plant be bent over and covered with earth they will frequently start new roots and produce a fresh crop of fruit, or if plants which have made a crop in the greenhouse be transplanted to the garden and cut back, a new set of roots will often develop and the plant will produce a second crop of fruit which, in amount, often equals or exceeds the first one. But such growths come only from new roots springing from the stem—never from an extension of the old root system.

Characteristics of the stem and leaves.—The growth of the stem, and leaves of the young tomato plant is very rapid and, the cellular structure coarse, loose and open. A young branch is easily broken and when this is done it shows scarcely any fibrous structure—simply a mass of coarse cellular matter which while capable, when young, of transmitting nutritive matter rapidly, soon becomes dogged and inert. This structure not only makes the active life of the leaves short, like that of the roots, but necessitates a fresh growth in order to continue the fruitfulness of the plant and renders the leaves very susceptible to injury from bacterial and fungous diseases. The rapid growth also necessitates an abundance of sunlight.

Characteristics of the blossom.—The inflorescence of the tomato is usually abundant and it is rare that a plant does not produce sufficient blooms for a full crop. The flowers are perfect as far as parts are concerned (Fig. 2) and in bright, sunny weather there is an abundance of pollen, but sunlight and warmth are essential to its maturing into a condition in which it can easily reach the stigma. The structure and development of the flower are such that while occasionally, particularly in healthy plants out of doors, the stigma becomes receptive and takes the pollen as it is pushed out through the stamen tube by the elongating style, it is more often pushed beyond them before the pollen matures, so that the pollen has to reach the stigma through some other means. Usually this is accomplished by the wind, either directly or through the motion of the plants.

Under glass it is generally necessary to assist the fertilization either directly by application or by motion of the plant, this latter only being effective in the middle of a bright sunny day. In the open ground in cold, damp weather the flowers often fail of fertilization, in which case they drop, and this is often the first indication of a failing of the crop on large, strong vines. I have known of many cases where the yield of fruit from large and seemingly very healthy vines was very light because continual rains prevented the pollenization of the flowers. Such failures, however, do not always come from a want of pollen but may result from an over or irregular supply of water either at the root or in the air, imperfectly balanced food supply, a sapping of the vitality of the plants when young, or from other causes. Insects rarely visit tomato flowers and are seldom the means of their fertilization.

Characteristics of the fruit.—The fruit of the original species from which our cultivated tomatoes have developed was doubtless a comparatively small two to many-celled berry, with comparatively dry central placenta and thin walls. In some species the cells were indicated by distinct sutures, forming a rough or corrugated fruit. It has improved under cultivation by increase in size, the material thickening of the cell walls, the development of greater juiciness and richer flavor and a decrease in the size and dryness of the placenta, as well as the breaking up of the cells by fleshy partitions resulting in the disappearance of the deep sutures and an improvement in the smoothness and beauty of the fruit. (Fig. 11.)

The quality of the fruit is largely dependent upon varietal differences, to be spoken of later, but it is also influenced by conditions of growth—such as the proportion of the nutritive elements found in the soil, the proper supply of moisture, the degree and uniformity of temperature and, most of all, the amount of sunlight. Sudden changes of temperature and moisture often result in cracks and fissures in the skin and flesh, which not only injure the appearance but affect the flavor of the fruit.